Fly-wheel



.--(N0 Model.)

V B. F. EIBLER.

' I FLY WHEEL. 0. 558,163. Patented Apr. 14, 1896.

B GRAHAM 'NUTO-UMQWASHINGIQMD C A I a 1 nun:

WITNESS E UNITED STATES BERN HARD F. EIBLER, OF CLEVELAND, OHIO.

FLY-WH EEL.

SPECIFICATION forming part of Letters Patent No. 558,163, dated April 14, 1896. Application filed August 19, 1895. Serial No. 559,871. (No model.)

To aZZ whom it may concern:

Be it known that I, BERNHARD F. EIBLER, a citizen of the United States, residing at Cleveland, in the county of Ouyahoga and State of Ohio, have invented a new and use ful Fly-Wheel, of which the following is a full, true, and exact description.

My invention consists of or in a unique and novel manner of distributing in the rims of fiy-Wheels the counterbalance for cranks or other movable parts in connection with which said wheels are applied.

The object of my invention is to so provide a counterbalance for the above-said parts as to be not only most effectual with a minimum of difference in the cross-sectional area of the rims of said wheels, but also to be symmetrically distributed. I attain these objects substantially in the manner as shown in the accompanying drawings, in which- Figure 1 represents a sectional view of a fly-wheel embodying the features above referred to in relation to the crank, which is shown in connection therewith. Fig. 2 illustrates a face view of the above-said parts, and Fig. 3 is a detached section thereof.

Like letters and numerals of reference denote like parts in the drawings and specification.

For illustration a wheelA is shown comprising six arms, in which instance I prefer to divide the rim a of said wheel into an analogous number of spaces 1 2 3 4., &c., and, according to the spirit of my invention, each space resembles more or less of a depression in the rim or of said wheel, depending upon the weight of the parts to be counterbalanced by said wheel. As shown, it is the crank part b of the shaft B for which a counterbalance is to be effected by means of the wheel A. If there are six spokes and acorresponding number of spaces, then it is from the center line through any two spokes that the spaces vary in the extent of depression.

As shown, the line ca 00 is assumed to indicate the dividing-line between the depressions, which increase and decrease in crosssectional area from a mean depression, as shown in Fig. 3. The cross-sections of the spaces 1 and 3 and 4: and 6 nearest the line a: a; correspond with said mean depression. From said line the depressions increase in the spaces 1 and 3 toward the space 2, which space presents the maximum of depression or the minimum in cross-sectional area of the 5 5 rim. (See Figs. 1 and 2.) In a like measure do the depressions decrease in the spaces 4 and 6 toward the least-depressed space 5, which contains the heaviest part of the rim. (See Figs. 1 and 2.)

In view of the foregoing it is evident that the wheel must be secured in such a position on the shaft B that the crank part thereof is directly opposite the section 5, or in line with the lightest section 2. In this manner a perfect counterbalance for the crank-shaft can be attained without crowding surplus material onto one particular place upon the rim of said wheel.

Extremes in the cross-sectional area of the rim are avoided, and, comparatively to the amount of material expended, the wheel attains a higher resistance as to strains due to the centrifugal force developed by the rim thereof.

Aside from the advantages above cited a symmetrical form of the wheel can be attained by providing for the balance in the manner as shown.

It is preferred that the rim be divided in as many spaces as there are spokes, provided, however, that the spokesare of even number, and if, for instance, a wheel has only three or five spokes then the rim should contain at least two or four sections, wherein the material is gradually distributed to present the necessary balance for the parts in connection with which it is to be used.

WVhat I claim, and desire to secure by Letters Patent, is

1. The combination,with a crank and shaft,

of a fiy-wheel whose rim is divided by ribs into sections corresponding in number to the number of .arms of the wheel, eachsection extending between two of said arms, said sections gradually decreasing in thickness toward the crank,the section or sections farthest removed from the crank being of the greatest thickness for the purpose of counterbalancing' crank being of the greatest thickness for the said crank. purpose of counterbalancing' said crank and 2. The combination of a Wheel, crank, and the parts moving with or moved by said crank. shaft, the Wheel having a rim, divided into distinct sections, said sections gradually de- BERNHARD F. EIBLER. creasing in thickness toward the crank, the Vitness: section or sections farthest removed from the MORTON XV. COPE. 

